/* Copyright  2009
   @Author
   Richard Changde Yin            e-mail yinchangde@hotmail.com

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
   
/**
 * @filename: function/num1.cc
 **/ 

#include <server_includes.h>

#include CSTDINT_H
#include <cassert>

#include <function/num1.h>

/**
  Set result type for a numeric function of one argument
  (can be also used by a numeric function of many arguments, if the result
  type depends only on the first argument)
*/

void Item_func_num1::find_num_type()
{
  switch (hybrid_type= args[0]->result_type()) {
  case INT_RESULT:
    unsigned_flag= args[0]->unsigned_flag;
    break;
  case STRING_RESULT:
  case REAL_RESULT:
    hybrid_type  = REAL_RESULT;
    max_length   = float_length(decimals);
    break;
  case DECIMAL_RESULT:
    break;
  default:
    assert(0);
  }
  return;
}

void Item_func_num1::fix_num_length_and_dec()
{
  decimals    = args[0]->decimals;
  max_length  = args[0]->max_length;
}



